Choose the correct option to complete the sentence in indirect speech:
The teacher said, "The Earth revolves around the Sun."
The teacher said that the Earth ____around the Sun.
The two ways of relating what a person has said are 1)direct and 2)indirect (reported speech).In direct speech, the original speaker's exact words are repeated. In indirect/reported speech, the exact meaning is expressed but not necessarily using the original speaker's exact words. Pronouns and possessive adjectives usually change from first or second person to the third person except when the speaker is reporting his own words. Sometimes a noun can be inserted to avoid doubt.
When we turn direct questions and exclamations into indirect speech, they are converted to affirmative statement .( ? and ! is not used).
Option C is correct as the given direct speech is changed to indirect speech and revolves is the correct answer as it is a universal fact.
The other options are wrong as tense shouldn't be changed because the given direct speech is a universal fact.
The correct answer is C)